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Watermark

A watermark is recognisable text, a logo or a pattern embedded in digital media (an image, video, PDF) that serves to identify the copyright owner or the origin of the content. It can be visible (a semi-transparent line of text or a logo) or invisible (digital metadata encoded directly in the file). Its main purpose is to make unauthorised copying, distribution or appropriation of someone else's work more difficult.

Watermarks originate in the paper industry, where they were created by varying the thickness of the paper during manufacture. In digital marketing we most often meet a semi-transparent brand logo placed in the corner of a photograph or video.

There are various approaches to using watermarks:

  1. The protective watermark: covers a large part of the image (often as a grid) to prevent commercial use without a licence (typical of stock photo libraries).
  2. The branding watermark: a discreet logo in the corner serving to raise brand awareness when content is shared on social media.
  3. The informational watermark: contains information about the document's status (“Draft”, “Confidential” or “Sample”).

Advantages

  • Copyright protection: it declares ownership clearly and discourages ordinary “theft” of images on the internet.
  • Building brand awareness: if your visual content goes viral, the watermark ensures people know who created it.
  • Proof of authenticity: in the era of generative AI a watermark can serve as a certificate of origin for a real photograph or an official document.
  • Tracking distribution: digital (invisible) watermarks let companies track where their files are spreading online.
  • A professional look: a well-designed, well-placed watermark can lend a photographer's or designer's portfolio a mark of exclusivity.

Disadvantages

  • Worse aesthetics: an overly prominent or badly placed watermark disrupts the visual experience and can devalue a work of art.
  • Easy removal: modern AI photo editing tools can remove simpler watermarks in seconds.
  • A negative emotional effect: in e-commerce, images with large watermarks can look untrustworthy or distracting to customers, which dampens the urge to buy.
  • Impractical when sharing: some platforms (Instagram, for instance) may penalise content carrying prominent logos of other apps (a TikTok watermark in Reels).

Practical example

A wedding photographer publishes samples of his work on Facebook.

  • Without a watermark: another agency downloads his photo and uses it for their own promotion without crediting the source. The photographer loses both the credit and potential clients.
  • With a discreet watermark: the photographer places his name in an elegant font in the bottom right corner at 30% opacity. When brides share the photo, everyone sees at once who took it. The watermark is subtle enough not to spoil the beauty of the moment but clear enough to bring new customers to his website.